The paper makes mathematical analysis on the causation of error in profile machining, and resolves the problem using altering the method in numerical calculation.
本文对这种加工误差产生的原因进行了数学分析，通过更改数值计算的方法解决这个问题。
2
The experiment error which altering barycenter of sand pendulum brings about is analyzed theoretically. And it is also an important factor comparing with others.